iojs/io.js — pull request #185 by bnoordhuis (2014-12-19 23:08:52+00:00)
Title: lib: micro-optimize EventEmitter#removeListener()

Replace the call to Array#splice() with a faster open-coded version
that creates less garbage.

Add a new benchmark to prove it. With the change applied, it scores
a whopping 40% higher.

R=@chrisdickinson